The New John Gill Exposition of the Entire Bible1 Chronicles 3:9
These were all the sons of David…
By his wives:
beside the sons of the concubines;
who are not reckoned, and how many
they were is not known; he had ten concubines at least, (2 Samuel 15:16) and
(2 Samuel 20:3) .
And Tamar their sister;
not the sister of the sons of the concubines,
but of his other sons, and only of Absalom by the mother's side, of
whom see (2 Samuel 13:1-39) .